Arid-zone agriculture
   HOME

TheInfoList



OR:

Dryland farming and dry farming encompass specific agricultural techniques for the non-irrigated cultivation of
crop A crop is a plant that can be grown and harvested extensively for profit or subsistence. When the plants of the same kind are cultivated at one place on a large scale, it is called a crop. Most crops are cultivated in agriculture or hydropon ...
s. Dryland farming is associated with
drylands Drylands are defined by a scarcity of water. Drylands are zones where precipitation is balanced by evaporation from surfaces and by transpiration by plants (evapotranspiration). The United Nations Environment Program defines drylands as tropical ...
, areas characterized by a cool
wet season The wet season (sometimes called the Rainy season) is the time of year when most of a region's average annual rainfall occurs. It is the time of year where the majority of a country's or region's annual precipitation occurs. Generally, the sea ...
(which charges the soil with virtually all the moisture that the crops will receive prior to harvest) followed by a warm dry season. They are also associated with
arid A region is arid when it severely lacks available water, to the extent of hindering or preventing the growth and development of plant and animal life. Regions with arid climates tend to lack vegetation and are called xeric or desertic. Most ...
conditions, areas prone to
drought A drought is defined as drier than normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D.  Jiang, A.  Khan, W.  Pokam Mba, D.  Rosenfeld, J. Tierney, an ...
and those having scarce water resources.


Process

Dryland farming has evolved as a set of techniques and management practices used by farmers to continually adapt to the presence or lack of moisture in a given crop cycle. In marginal regions, a farmer should be financially able to survive occasional crop failures, perhaps for several years in succession. Survival as a dryland farmer requires careful husbandry of the moisture available for the crop and aggressive management of expenses to minimize losses in poor years. Dryland farming involves the constant assessing of the amount of moisture present or lacking for any given crop cycle and planning accordingly. Dryland farmers know that to be financially successful they have to be aggressive during the good years in order to offset the dry years. Dryland farming is dependent on natural rainfall, which can leave the ground vulnerable to
dust storms A dust storm, also called a sandstorm, is a meteorological phenomenon common in arid and semi-arid regions. Dust storms arise when a gust front or other strong wind blows loose sand and dirt from a dry surface. Fine particles are trans ...
, particularly if poor farming techniques are used or if the storms strike at a particularly vulnerable time. The fact that a
fallow Fallow is a farming technique in which arable land is left without sowing for one or more vegetative cycles. The goal of fallowing is to allow the land to recover and store organic matter while retaining moisture and disrupting pest life cycl ...
period must be included in the
crop rotation Crop rotation is the practice of growing a series of different types of crops in the same area across a sequence of growing seasons. It reduces reliance on one set of nutrients, pest and weed pressure, and the probability of developing resistant ...
means that fields cannot always be protected by a cover crop, which might otherwise offer protection against
erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is dis ...
. Some of the theories of dryland farming developed in the late 19th and early 20th centuries claimed to be scientific but were in reality pseudoscientific and did not stand up to empirical testing. For example, it was alleged that
tillage Tillage is the agricultural preparation of soil by mechanical agitation of various types, such as digging, stirring, and overturning. Examples of human-powered tilling methods using hand tools include shoveling, picking, mattock work, hoein ...
would seal in moisture, but such "dust mulching" ideas are based on what people imagine ''should'' happen, or have been told, rather than what testing actually confirms. In actuality, it has been shown that tillage increases water losses to evaporation. The book '' Bad Land: An American Romance'' explores the effects that this had on people who were encouraged to
homestead Homestead may refer to: *Homestead (buildings), a farmhouse and its adjacent outbuildings; by extension, it can mean any small cluster of houses * Homestead (unit), a unit of measurement equal to 160 acres *Homestead principle, a legal concept t ...
in an area with little rainfall; most
smallholding A smallholding or smallholder is a small farm operating under a small-scale agriculture model. Definitions vary widely for what constitutes a smallholder or small-scale farm, including factors such as size, food production technique or technology ...
s failed after working miserably to cling on. Dry farming depends on making the best use of the "bank" of soil moisture that was created by winter rainfall. Some dry farming practices include: * Wider than normal spacing, to provide a larger bank of moisture for each plant. * Controlled Traffic. * Minimal tilling of land. * Strict weed control, to ensure that weeds do not consume soil moisture needed by the cultivated plants. * Cultivation of soil to produce a "dust mulch", thought to prevent the loss of water through capillary action. This practice is controversial, and is not universally advocated. * Selection of crops and cultivars suited for dry farming practices.


Locations

left, Wheat_Dryland_Farming_in_Behbahan,_Iran.html" ;"title="Behbahan.html" ;"title="Wheat Dryland Farming in Behbahan">Wheat Dryland Farming in Behbahan, Iran">Behbahan.html" ;"title="Wheat Dryland Farming in Behbahan">Wheat Dryland Farming in Behbahan, Iran Dry farming may be practiced in areas that have significant annual rainfall during a wet season, often in the winter. Crops are cultivated during the subsequent dry season, using practices that make use of the stored moisture in the soil. California, Colorado, Kansas, South Dakota, North Dakota, Montana, Nebraska, Oklahoma, Oregon, Washington, and Wyoming, in the United States, are a few states where dry farming is practiced for a variety of crops. Dryland farming is used in the Great Plains, the
Palouse The Palouse ( ) is a distinct geographic region of the northwestern United States, encompassing parts of north central Idaho, southeastern Washington, and, by some definitions, parts of northeast Oregon. It is a major agricultural area, prima ...
plateau of
Eastern Washington Eastern Washington is the region of the U.S. state of Washington located east of the Cascade Range. It contains the city of Spokane (the second largest city in the state), the Tri-Cities, the Columbia River and the Grand Coulee Dam, the Hanf ...
, and other arid regions of North America such as in the Southwestern United States and
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
(see Agriculture in the Southwestern United States and
Agriculture in the prehistoric Southwest Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people t ...
), the Middle East and in other grain growing regions such as the steppes of Eurasia and
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
. Dryland farming was introduced to southern Russia and Ukraine by
Ukrainian Mennonites The Russian Mennonites (german: Russlandmennoniten it. "Russia Mennonites", i.e., Mennonites of or from the Russian Empire occasionally Ukrainian Mennonites) are a group of Mennonites who are descendants of Dutch Anabaptists who settled for abo ...
under the influence of
Johann Cornies Johann(es) Cornies (20 June 1789 – 13 March 1848) was a Prussian Mennonite settler in the Russian Empire, who became an important agricultural and architectural reformer for the Russian Mennonites, Mennonites, Hutterites and other minorities in th ...
, making the region the
breadbasket The breadbasket of a country or of a region is an area which, because of the richness of the soil and/or advantageous climate, produces large quantities of wheat or other grain. Rice bowl is a similar term used to refer to Southeast Asia; and C ...
of Europe. In Australia, it is widely practiced in all states but the
Northern Territory The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an Australian territory in the central and central northern regions of Australia. The Northern Territory shares its borders with Western Aust ...
.


Crops

file:Palouse hills - 9591.jpg, Fields in the
Palouse The Palouse ( ) is a distinct geographic region of the northwestern United States, encompassing parts of north central Idaho, southeastern Washington, and, by some definitions, parts of northeast Oregon. It is a major agricultural area, prima ...
, Washington State Dry farmed crops may include grapes, tomatoes, pumpkins, beans, and other summer crops. Dryland grain crops include wheat, corn, millet, rye, and other grasses that produce grains. These crops grow using the winter water stored in the soil, rather than depending on rainfall during the growing season. Dryland farmed crops may include
winter wheat Winter wheat (usually '' Triticum aestivum'') are strains of wheat that are planted in the autumn to germinate and develop into young plants that remain in the vegetative phase during the winter and resume growth in early spring. Classificatio ...
,
maize Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. The ...
, beans,
sunflowers ''Helianthus'' () is a genus comprising about 70 species of annual and perennial flowering plants in the daisy family Asteraceae commonly known as sunflowers. Except for three South American species, the species of ''Helianthus'' are native to N ...
or even
watermelon Watermelon (''Citrullus lanatus'') is a flowering plant species of the Cucurbitaceae family and the name of its edible fruit. A scrambling and trailing vine-like plant, it is a highly cultivated fruit worldwide, with more than 1,000 varie ...
. Successful dryland farming is possible with as little as of precipitation a year; higher rainfall increases the variety of crops. Native American tribes in the arid Southwest survived for thousands of years on dryland farming in areas with less than of rain. The choice of crop is influenced by the timing of the predominant rainfall in relation to the seasons. For example, winter wheat is more suited to regions with higher winter rainfall while areas with summer wet seasons may be more suited to summer growing crops such as sorghum, sunflowers or
cotton Cotton is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus '' Gossypium'' in the mallow family Malvaceae. The fiber is almost pure cellulose, and can contain minor pe ...
. Everyone knows that plants need water, soil, oxygen and sunlight in order to grow strong and healthy, but what happens when water is scarce? Modern farming solutions to this problem include irrigation systems that can direct water to rows of crops in huge fields, but some farmers believe that a return to dry farming is the solution. What Is Involved In A Dry Farming Operation?
Dry Farming Dryland farming and dry farming encompass specific agricultural techniques for the non-irrigated cultivation of crops. Dryland farming is associated with drylands, areas characterized by a cool wet season (which charges the soil with virtuall ...
is a natural technique that utilizes rainwater and water leached from the ground in dry environments. Groundwater supply is often the result of melted snow and ice in climates that experience high precipitation in the winter and dry heat in the summer. Water from nearby watershed sources can also be used in dry farming, and some believe that the use of dry farms could solve not only food shortage challenges in small communities but also climate change concerns.


Other considerations

; Capturing and conservation of moisture: In regions such as
Eastern Washington Eastern Washington is the region of the U.S. state of Washington located east of the Cascade Range. It contains the city of Spokane (the second largest city in the state), the Tri-Cities, the Columbia River and the Grand Coulee Dam, the Hanf ...
, the average annual precipitation available to a dryland farm may be as little as . In the
Horse Heaven Hills The Horse Heaven Hills are a long range of high, rolling hills in Klickitat, Yakima, and Benton counties in Washington. The hills are an anticline ridge in the Yakima Fold Belt formed by north–south compression of lava flows in the Columbi ...
in central Washington, wheat farming has been productive purportedly on an average annual rainfall approaching 6 inches. Consequently, moisture must be captured until the crop can utilize it. Techniques include summer fallow rotation (in which one crop is grown on two seasons' precipitation, leaving standing stubble and
crop residue Crop residues are materials left in an agricultural field after the crop has been harvested. These residues include stalks and stubble (stems), leaves and seed pods. Good management of field residues can increase efficiency of irrigation and c ...
to trap snow), and preventing
runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock marke ...
by terracing fields. "Terracing" is also practiced by farmers on a smaller scale by laying out the direction of furrows to slow water runoff downhill, usually by plowing along either contours or keylines. Moisture can be conserved by eliminating weeds and leaving crop residue to shade the soil. ; Effective use of available moisture: Once moisture is available for the crop to use, it must be used as effectively as possible. Seed planting depth and timing are carefully considered to place the seed at a depth at which sufficient moisture exists, or where it will exist when seasonal precipitation falls. Farmers tend to use crop varieties which are
drought-tolerant Drought tolerance is the ability to which a plant maintains its biomass production during arid or drought conditions. Some plants are naturally adapted to dry conditions'','' surviving with protection mechanisms such as desiccation tolerance, deto ...
and heat-stress tolerant (even lower-yielding varieties). Thus the likelihood of a successful crop is hedged if seasonal precipitation fails. ;
Soil conservation Soil conservation is the prevention of loss of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization or other chemical soil contamination. Slash-and-burn and other uns ...
: The nature of dryland farming makes it particularly susceptible to erosion, especially wind erosion. Some techniques for conserving soil moisture (such as frequent tillage to kill weeds) are at odds with techniques for conserving topsoil. Since healthy
topsoil Topsoil is the upper layer of soil. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Description Topsoil is composed of mineral particles and organic matt ...
is critical to
sustainable agriculture Sustainable agriculture is farming in sustainable ways meeting society's present food and textile needs, without compromising the ability for current or future generations to meet their needs. It can be based on an understanding of ecosystem ser ...
, in particular within arid areas, its preservation is generally considered the most important long-term goal of a dryland farming operation. Erosion control techniques such as
windbreak A windbreak (shelterbelt) is a planting usually made up of one or more rows of trees or shrubs planted in such a manner as to provide shelter from the wind and to protect soil from erosion. They are commonly planted in hedgerows around the edges ...
s, reduced tillage or
no-till No-till farming (also known as zero tillage or direct drilling) is an agricultural technique for growing crops or pasture without disturbing the soil through tillage. No-till farming decreases the amount of soil erosion tillage causes in certai ...
, spreading straw (or other
mulch A mulch is a layer of material applied to the surface of soil. Reasons for applying mulch include conservation of soil moisture, improving fertility and health of the soil, reducing weed growth and enhancing the visual appeal of the area. A mu ...
on particularly susceptible ground), and strip farming are used to minimize topsoil loss. ''Weedling '',Weedling is process of turning over 90 degree and exposing weed's root during tillage to prevent soil erosion by wind and desertification. At the same time, Direct absorption of nutrients from weeds and moisture provides suitable environment to floris biodiversity of organisms in soil. ; Control of input costs: Dryland farming is practiced in regions inherently marginal for non-irrigated agriculture. Because of this, there is an increased risk of
crop failure Harvesting is the process of gathering a ripe crop from the fields. Reaping is the cutting of grain or pulse for harvest, typically using a scythe, sickle, or reaper. On smaller farms with minimal mechanization, harvesting is the most labor- ...
and poor yields which may occur in a dry year (regardless of money or effort expended). Dryland farmers must evaluate the potential yield of a crop constantly throughout the growing season and be prepared to decrease inputs to the crop such as fertilizer and
weed control Weed control is a type of pest control, which attempts to stop or reduce growth of weeds, especially noxious weeds, with the aim of reducing their competition with desired flora and fauna including domesticated plants and livestock, and in n ...
if it appears that it is likely to have a poor yield due to insufficient moisture. Conversely, in years when moisture is abundant, farmers may increase their input efforts and budget to maximize yields and to offset poor harvests.


Arid-zone agriculture

An example of a dryland farming paddock As an area of research and development, arid-zone agriculture, or desert agriculture, includes studies of how to increase the agricultural productivity of lands dominated by lack of freshwater, an abundance of heat and sunlight, and usually one or more of: Extreme winter cold, short rainy season, saline soil or water, strong dry winds, poor soil structure, over-grazing, limited technological development, poverty, or political instability. The two basic approaches are: * View the given environmental and socioeconomic characteristics as negative obstacles to be overcome. * View as many as possible of them as positive resources to be used.


See also

*
Agriculture in Israel Agriculture in Israel is a highly developed industry. Israel is a major exporter of fresh produce and a world-leader in agricultural technologies despite the fact that the geography of the country is not naturally conducive to agriculture. More ...
*
Agriculture in the prehistoric Southwest Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people t ...
*
Arid Forest Research Institute Arid Forest Research Institute (AFRI) is a research institute situated in Jodhpur, Rajasthan, India. The institute conducts scientific research in forestry in order to provide technologies to increase the vegetative cover and to conserve biod ...
* Biosalinity *
Dust Bowl The Dust Bowl was a period of severe dust storms that greatly damaged the ecology and agriculture of the American and Canadian prairies during the 1930s. The phenomenon was caused by a combination of both natural factors (severe drought) a ...
* Environmental issues with agriculture *
International Center for Agricultural Research in the Dry Areas The International Center for Agricultural Research in the Dry Areas (ICARDA), a member of CGIAR, supported by the CGIAR Fund, is a non-profit agricultural research institute that aims to improve the livelihoods of the resource-poor across the ...
*
Irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been devel ...
*
Seawater greenhouse A seawater greenhouse is a greenhouse structure that enables the growth of crops and the production of fresh water in arid regions which constitute about one third of the earth's land area. This in response to the global water scarcity and peak ...
*
Small-scale agriculture A smallholding or smallholder is a small farm operating under a small-scale agriculture model. Definitions vary widely for what constitutes a smallholder or small-scale farm, including factors such as size, food production technique or technology ...
* University of Arid Agriculture *
Xerophyte A xerophyte (from Greek ξηρός ''xeros'' 'dry' + φυτόν ''phuton'' 'plant') is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert such as the Sahara or places in the Alps or the ...


References

10
Dry Farming
Dry Farming Everyone knows that plants need water, soil, oxygen and sunlight in order to grow strong and healthy,


Further reading

* Henry Gilbert, ''Dryland Farming: January 1982–December 1990'' (Beltsville, Md.: U.S. Department of Agriculture, National Agricultural Library, 1991) * Mary W. M. Hargraves, ''Dry Farming in the Northern Great Plains: Years of Readjustment, 1920–1990'' (Lawrence: University of Kansas, 1993) * Oklahoma State Board of Agriculture, Report (Guthrie, OK: n.p. 1908) * Dr. John A. Widtsoe, Ph.D. ''Dry-Farming, A System Of Agriculture For Countries Under A Low Rainfall'' (NY: The Macmillan Company, 1911) * Victor Squires and Philip Tow, ''Dryland Farming: A Systems Approach – An Analysis of Dryland Agriculture in Australia'' (Sydney: Sydney University Press, 1991) * O'Bar, Scott, (2013). Alternative Crops for Drylands – Proactively Adapting to Climate Change and Water Shortages. Amaigabe Press, Santa Barbara, CA
Encyclopedia of Oklahoma History and Culture – Dry Farming
* P. Koohafkan and B.A. Stewart

published by The Food and Agriculture Organization of the United Nations and Earthscan
PDF
* Steve Solomon, ''Water-Wise Vegetables: For the Maritime Northwest Gardener'' (Sasquatch Books, 1993)


External links

* {{Authority control Agriculture by type